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| author | Helge Deller <deller@gmx.de> | 2013-02-20 22:35:36 +0100 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2013-02-20 22:35:36 +0100 |
| commit | 26ad19d8ebdb73869341b1b4159d32c0f0755946 (patch) | |
| tree | 7861bb4df8b452ad5f71c8818d5f814f483f2150 /arch/parisc/kernel | |
| parent | 19f949f52599ba7c3f67a5897ac6be14bfcb1200 (diff) | |
| parent | 6c700d71f7faecb540b3fa4303edb5323a2768c1 (diff) | |
Merge tag 'parisc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/parisc-2.6 into stable-3.8
PARISC fixes on 20130213
This is a couple of patches, one to fix a broken build with HPUX compatibility
and the other to solve a coherency problem we've been seeing in our TLB where
setting a page read only occasionally fails to trigger a COW because of a
stale writeable TLB entry.
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'arch/parisc/kernel')
| -rw-r--r-- | arch/parisc/kernel/cache.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c index 48e16dc20102..b89a85ab945e 100644 --- a/arch/parisc/kernel/cache.c +++ b/arch/parisc/kernel/cache.c @@ -419,6 +419,24 @@ void kunmap_parisc(void *addr) EXPORT_SYMBOL(kunmap_parisc); #endif +void purge_tlb_entries(struct mm_struct *mm, unsigned long addr) +{ + unsigned long flags; + + /* Note: purge_tlb_entries can be called at startup with + no context. */ + + /* Disable preemption while we play with %sr1. */ + preempt_disable(); + mtsp(mm->context, 1); + purge_tlb_start(flags); + pdtlb(addr); + pitlb(addr); + purge_tlb_end(flags); + preempt_enable(); +} +EXPORT_SYMBOL(purge_tlb_entries); + void __flush_tlb_range(unsigned long sid, unsigned long start, unsigned long end) { |